Extract from the original post
"Official SharePoint 2010 Upgrade Resource Centers
SharePoint 2010 Upgrade Resource Center – MSDN.
Upgrade and migration resource center for SharePoint Foundation 2010 - TechNet
Upgrade and migration resource center for SharePoint Server 2010 - TechNe
Unofficial 2010 Wiki Site Focused Exclusively on Upgrade - Great Design!
SharePointUpgrade.com - Community driven wiki based upgrade resources
SharePoint Joel's Recent Blog Posts Drill Down into SharePoint 2010 Upgrade Insights
PreUpgradeCheck Drill Down - A detailed look at the PreUpgradeCheck command and its reporting and best practices insights you should be using today
How to Remove Corrupted SharePoint Sites Webs and Lists including Orphaned sites - SP2 enhancements provide make removing corrupt sites and identifying sites much better
What Happened to Gradual Upgrade? - A look at how visual upgrade provides what you had with gradual upgrade"
For complete post click here.
